Calculation details
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Use this result
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What does this calculator estimate?
A car traveling 300 meters in 20 seconds moves at 15 m/s, which is 54 km/h or about 33.6 mph. Velocity = distance / time; km/h = m/s x 3.6 and mph = m/s x 2.236936.
- Velocity (m/s) = distance (m) / time (s).
- km/h = m/s x 3.6; mph = m/s x 2.236936.
- Velocity includes direction; speed does not.
What average velocity is
Average velocity is total distance divided by total time — the constant speed that would cover the same distance. It's the foundation of motion analysis: estimating arrival times, speeds, and performance.
Limitations to watch for
This is average speed; instantaneous speed varies along the way (traffic, stops, hills). Strictly, velocity includes direction while speed doesn't — the tool computes the magnitude. Use consistent units.
How to use it in practice
Measure the total distance and elapsed time, then divide. Use the conversions for everyday units. For speed limit comparisons or trip planning, check the average against expected traffic conditions.
['Enter the distance in meters.', 'Enter the time in seconds.', 'The tool reports m/s, km/h, and mph.']
How this calculator works
Formula
Average velocity v = distance ÷ time. The tool also converts to km/h (×3.6) and mph (×2.236936).
Worked example
100 meters in 10 seconds: v = 10 m/s = 36 km/h ≈ 22.4 mph.
Assumptions to verify
- Motion is along the path with no direction change considered.
- The average over the whole interval is desired.
- Distance and time are in the given units.
Frequently asked questions
How do I calculate velocity?
Divide distance by time: 100 m ÷ 10 s = 10 m/s.
What's the difference between speed and velocity?
Speed is the magnitude of motion; velocity includes direction. This tool computes the magnitude (speed).
How do I convert m/s to km/h?
Multiply by 3.6. 10 m/s = 36 km/h. To mph, multiply by 2.236936 (≈22.4 mph).
What is average velocity?
Total distance ÷ total time — the constant speed that matches the overall trip.
How do I convert mph to m/s?
Multiply by 0.44704. 60 mph ≈ 26.8 m/s.
Why is instantaneous speed different?
Traffic, stops, and hills make real speed vary. Average velocity smooths it over the whole trip.
Does this work for any units?
Yes — just keep them consistent. The tool's conversion outputs assume meters and seconds.
Cite this tool
BoringToolsKit. “Velocity Calculator.” boringtoolskit.com/velocity-calculator/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
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